[BUG] The video does not play back from the ripped HTML page

[dotherightthing]

Describe the bug
The video embed on a lesson page shows "Your video is processing" and there is no play button

To Reproduce
Steps to reproduce the behavior:

1. Log into course with username and password
2. Follow Usage steps documented at https://github.com/FallingLights/Teachable-dl?tab=readme-ov-file#usage
3. Open /path/to/Teachable-DL/courses/course_name/folder_name/page_name.html
4. Scroll down to the video embed
5. Confirm that the embed shows "Your video is processing"
   ...

Expected behavior
After opening a ripped HTML page, I expect to be able to play the embedded video.

Screenshots

Desktop (please complete the following information):

• OS: macOS 15.7.4
• Browser Version: Firefox 148.0

Additional context
None

[dotherightthing]

Note that I can play the embedded video (in VLC) if I access it directly.

[pixelthorn]

FWIW, this is the same underlying issue as #58

[youngerdd]

how to solve this problem? just html not mp4 format.